Paul T. Cahill took over the architectural practice of Fountain and Moratz (1910-1914), known as A. F. Moratz & Company, in 1913. He was born in Tennessee. His work included churches, schools, hospitals, and libraries. He was a graduate of the Dayton School of Art and received a Bachelor of Science degree from Hiram College. For two years he was an instructor in mechanical and architectural drawing at the Stivers Manual Training High School in Dayton. He later went to Cornell University. He received early training in the offices of Schenk & Williams and Albert Pretzinger in Dayton. From 1921 to 1923 he was a member of the firm of Fulton, Taylor & Cahill. He later moved to Fort Worth, Texas.